Compare Reference Electrode Kits
| Full Name of Reference Electrode | Formula | Chemical Used | Description/Notes | Compare to: |
|---|---|---|---|---|
| Mercury/ Mercury Oxide Electrode Kit (5088) | Hg/HgO | Our standard conc. is 20% KOH
Custom is avail |
Mercury (II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO. Safe for use in alkali or fluoride media. All plastic construction. |
-579 vs. MSE (sat. potassium sulfate) |
| Mercury Sulfate Electrode Kit K2SO4 (5100P) | Hg/Hg₂SO₄ | Sat. Potassium Sulfate Solution | The Hg/Hg₂SO₄ Reference Electrode is recommended when chloride ion is not desired in the electrolyte. Has a filling solution of potassium sulfate. | +410 vs. SCE |
| Mercury Sulfate & Acid Electrode Kit (5100A) | Hg/HgKO₄ | Sulfuric Acid | Mercury-Mercurous sulfate reference electrodes, has been widely used in the past, in order to measure half-cell potentials in lead-acid batteries. | -70 vs. MSE (sat. potassium sulfate) |
| Saturated Calomel Electrode Kit SCE (1001) | Hg₂Cl₂ | Mercury(I) chloride Sat. KCL Solution | The universal standard reference. The Saturated Calomel Electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. | -410 vs. Hg/Hg2SO4 |
| Silver/ Silver Chloride Electrode Kit (1004) | Ag/AgCl | Silver (I) Chloride Sat. KCL/AgCI | The silver chloride electrode is the most commonly used reference electrode for testing cathodic protection corrosion control systems in sea water environments. | -47 vs. SCE |
| Silver/ Silver Sulfate Electrode Kit (1003) | Ag/Ag₂SO₄ | Sulfuric acid disilver(I) salt Saturated potassium sulfate and silver | A reproducible and stable electrode potential, situated 38.4 mV positive with respect to that of the Hg/Hg₂SO₄ couple. The preparation and application of a simple silver/silver sulfate reference electrode for an aqueous solution, which can be used as an alternative in chloride-free systems. | +38 vs. Hg/Hg2SO4 |